User blog comment:Derekoe/Devil Arms, and Sparda's Time on Earth...?/@comment-4015736-20111028213928/@comment-775152-20111029071818

Personally, I think he does age slowly, but not at a consistant rate. From year 1 to maybe about 30 is a 1:1 ratio Dante to human, but after that it effectively stops, and Dante just stays looking about 30. I dunno, really, just speculating. Dante does share a lot in common thematically with Vash the Stampede, who looks perpetually 25ish despite being much much older, so it's not a stretch to think they are similar in that aspect, too.